package com.da.springcloud.controller;

import java.net.URI;
import java.util.List;

import javax.annotation.Resource;

import com.da.springcloud.entities.CommonResult;
import com.da.springcloud.entities.Payment;
import com.da.springcloud.lb.LoadBalancer;
import com.da.springcloud.util.ResultUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.util.CollectionUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

/**
 * @author JokerDa.
 * @date 2021/1/11 10:52
 * Description:
 */
@RestController
@Slf4j
public class OrderController {
    //public static final String PAYMENT_URL = "http://localhost:8001";
    /**
     * 通过在eureka上注册过的微服务名称调用
     */
    public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";

    @Resource
    private RestTemplate restTemplate;
    @Resource
    private LoadBalancer loadBalancer;
    @Resource
    private DiscoveryClient discoveryClient;

    /**
     * http://localhost/consumer/payment/create?serial=atguigu002
     */
    @GetMapping("/consumer/payment/create")
    public CommonResult<Integer> create(Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL + "/payment/create", payment, CommonResult.class);
    }

    /**
     * http://localhost/consumer/payment/get/3
     */
    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
    }

    /**
     * http://localhost/consumer/payment/getForEntity/3
     */
    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id) {
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id,
            CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()) {
            return entity.getBody();
        }
        return ResultUtil.error("操作失败！");
    }

    /**
     * http://localhost/consumer/payment/lb
     */
    @GetMapping(value = "/consumer/payment/lb")
    public CommonResult<String> getPaymentLB() {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if (CollectionUtils.isEmpty(instances)) {
            return ResultUtil.error("调用失败");
        }
        ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();
        String str = restTemplate.getForObject(uri + "/payment/lb", String.class);
        return ResultUtil.success("成功", str);
    }

    /**
     * 链路跟踪 zipkin+sleuth
     * http://localhost/consumer/payment/zipkin
     */
    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin() {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/zipkin/", String.class);
    }
}
